Namura .060 Over Bore Piston Kit for Honda TRX400EX & TRX400X Sportrax 86.5mm

Namura .060 Over Bore Piston Kit for Honda TRX400EX & TRX400X Sportrax 86.5mm

This Namura .060 over bore piston kit is a direct replacement performance part for Honda TRX400EX and TRX400X Sportrax ATVs, featuring a 86.5mm bore size to restore cylinder compression and power after a top-end rebuild.

Overview

This Namura .060 over bore piston kit is engineered for Honda TRX400EX and TRX400X Sportrax models, delivering a precise 86.5mm bore size for reliable performance. Designed as a drop-in replacement, it restores lost compression and extends engine life. Whether rebuilding or replacing the piston, this .060 over bore piston kit ensures a proper fit for your Sportrax 400cc engine.

Built For Performance

• Precision-machined from high-strength aluminum alloy for durability
• .060 oversize (1.5mm) restores cylinder bore to like-new condition
• Includes piston, rings, wrist pin, and circlips for a complete kit
• Designed for Honda TRX400EX and TRX400X engines
• 86.5mm bore diameter matches OEM specifications for overbore

Fits These Machines

• for Honda TRX400EX
• for Honda TRX400X

On-The-Job Use

• Trail riding and recreational ATV use
• Competition motocross and cross-country racing
• Engine rebuilds and top-end overhauls
• Routine maintenance to restore compression and power

Specs At A Glance

Good To Know

Q: Is this piston kit compatible with stock Honda cylinders? A: Yes, when the cylinder is bored to .060 over size, this kit is a direct fit for the specified Honda models.

Q: Does this kit include all necessary components? A: Yes, the kit includes the piston, rings, wrist pin, and circlips, everything needed for a complete piston replacement.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.